资源类型

期刊论文 304

会议视频 6

年份

2023 27

2022 20

2021 26

2020 14

2019 20

2018 13

2017 17

2016 13

2015 4

2014 7

2013 10

2012 14

2011 12

2010 31

2009 16

2008 18

2007 15

2006 3

2005 8

2004 6

展开 ︾

关键词

悬索桥 16

三塔悬索桥 4

动力特性 3

大跨度桥梁 3

桥梁工程 3

BNLAS 2

三塔两跨悬索桥 2

三峡工程 2

京津城际铁路 2

仿真优化 2

公路桥梁 2

加劲梁 2

动力学 2

南京长江第四大桥 2

大跨桥梁 2

自主开发 2

&ldquo 1

12相整流 1

1860 MPa等级 1

展开 ︾

检索范围：

排序： 展示方式：

Calculation method on shape finding of self-anchored suspension bridge with spatial cables

Yan HAN, Zhengqing CHEN, Shidong LUO, Shankui YANG

《结构与土木工程前沿（英文）》 2009年 第3卷 第2期   页码 165-172 doi: 10.1007/s11709-009-0021-6

摘要： Based on the spatial model, a reliable and accurate calculation method on the shape finding of self-anchored suspension bridge with spatial cables was studied in this paper. On the principle that the shape of the main cables between hangers is catenary, the iteration method of calculating the shapes of the spatial main cables under the load of hanger forces was deduced. The reasonable position of the saddle was determined according to the shape and the theoretical joint point of the main cables. The shapes of the main cables at completed cable stage were calculated based on the unchanging principle of the zero-stress lengths of the main cables. By using a numerical method combining with the finite element method, one self-anchored suspension bridge with spatial cables was analyzed. The zero-stress length of the main cables, the position of the saddle, and the pre-offsetting of the saddle of the self-anchored suspension bridge were given. The reasonable shapes of the main cables at bridge completion stage and completed cable stage were presented. The results show that the shape-finding calculation method is effective and reliable.

关键词： bridge engineering     self-anchored suspension bridges     special cables     shape-finding     calculation method    

HTML PDF 收藏

Investigations concerning seismic response control of self-anchored suspension bridge with MR dampers

YANG Menggang, HU Jianhua

《结构与土木工程前沿（英文）》 2008年 第2卷 第1期   页码 43-48 doi: 10.1007/s11709-008-0011-0

摘要： To mitigate the seismic response of self-anchored suspension bridges, equations of motion governing the coupled system of bridge- magneto-rheological (MR) dampers subject to seismic excitation are formulated by employing the phenomenological model of MR dampers. A corresponding computer program is developed and employed for studying the seismic response control of a self-anchored suspension bridge with a main span of 350 m. The effect of variable current and number of dampers on seismic response control is investigated. The numerical results indicate the longitudinal displacement of the tower top and bridge girder decrease with the increase in input current and number of MR dampers attached longitudinally at the tower-girder connections, and the internal forces of the tower are effectively attenuated as well. It appears that small electronic current (0.5 A in this study) may sufficiently attenuate the seismic responses for practical engineering applications.

关键词： longitudinal displacement     corresponding computer     excitation     phenomenological     self-anchored suspension    

HTML PDF 收藏

Computational fluid dynamic analysis of flutter characteristics for self-anchored suspension bridges

ZHU Zhiwen, WANG Zhaoxiang, CHEN Zhengqing

《结构与土木工程前沿（英文）》 2008年 第2卷 第3期   页码 267-273 doi: 10.1007/s11709-008-0034-6

摘要： This paper outlines the essentials and procedures of computational fluid dynamics (CFD) simulation applicable to evaluating flutter derivatives of bridge decks. An arbitrary Lagrangian-Eulerian (ALE) description of the flow around the moving rigid box girder combined with the finite volume discretization and multi-grid algorithm is presented. The proposed methods are employed to identify flutter derivatives of the bridge deck of the Sanchaji Self-anchored Suspension Bridge. The results agree well with ones from wind tunnel tests. It demonstrates accuracy and efficiency of the present method.

关键词： discretization     computational     description     Self-anchored Suspension     simulation applicable    

HTML PDF 收藏

Limit span of self-anchored cable-stayed suspension cooperation system bridge based on strength

Zhe ZHANG , Huili WANG , Xiaomeng GE , Sifeng QIN ,

《结构与土木工程前沿（英文）》 2009年 第3卷 第3期   页码 286-291 doi: 10.1007/s11709-009-0045-y

摘要： The limit span of self-anchored cable-stayed suspension bridge is deduced. The relations among the geometrical parameters, loads and material characteristics are also analyzed. Based on the material strength and commonly used materials, the limit spans of self-anchored cable-stayed suspension bridges with concrete girder or steel girder under vertical static load are discussed in detail. The corresponding upper limit spans and the effect of the factors on the span are given. The results indicate that increasing rise-span ratio, height-span ratio and cable-stayed segment length or reducing the second dead load could increase the cooperation system span.

关键词： cable-stayed suspension     self-anchored     limit span    

HTML PDF 收藏

Experimental research on the multilayer compartmental particle damper and its application methods on long-period bridge structures

Zhenyuan LUO, Weiming YAN, Weibing XU, Qinfei ZHENG, Baoshun WANG

《结构与土木工程前沿（英文）》 2019年 第13卷 第4期   页码 751-766 doi: 10.1007/s11709-018-0509-z

摘要： Particle damping technology has attracted extensive research and engineering application interest in the field of vibration control due to its prominent advantages, including wide working frequency bands, ease of installation, longer durability and insensitivity to extreme temperatures. To introduce particle damping technology to long-period structure seismic control, a novel multilayer compartmental particle damper (MCPD) was proposed, and a 1/20 scale test model of a typical long-period self-anchored suspension bridge with a single tower was designed and fabricated. The model was subjected to a series of shaking table tests with and without the MCPD. The results showed that the seismic responses of the flexible or semi-flexible bridge towers of long-period bridges influence the seismic responses of the main beam. The MCPD can be conveniently installed on the main beam and bridge tower and can effectively reduce the longitudinal peak displacement and the root mean square acceleration of the main beam and tower. In addition, no particle accumulation was observed during the tests. A well-designed MCPD can achieve significant damping for long-period structures under seismic excitations of different intensities. These results indicate that the application of MCPDs for seismic control of single-tower self-anchored suspension bridges and other long-period structures is viable.

关键词： energy dissipation devices     multilayer compartmental particle damper     self-anchored suspension bridges     shaking tables test     long-period structure     seismic control    

HTML PDF 收藏

Aerodynamic stability evolution tendency of suspension bridges with spans from 1000 to 5000 m

《结构与土木工程前沿（英文）》 doi: 10.1007/s11709-023-0980-z

摘要： Aerodynamic instability owing to aerostatic and flutter-related failures is a significant concern in the wind-resistant design of long-span suspension bridges. Based on the dynamic characteristics of suspension bridges with spans ranging from 888 to 1991 m, we proposed fitted equations for increasing spans and base frequencies. Finite element models of suspension bridges with increasing span from 1000 to 5000 m were constructed. The structural parameters were optimized to follow the fitted tendencies. To analyze the aerodynamic instability, streamlined single-box section (SBS), lattice truss section (LTS), narrow slotted section (NSS), and wide slotted section (WSS) were considered. We performed three-dimensional (3-D) full-mode flutter analysis and nonlinear aerostatic instability analysis. The flutter critical wind speed continuously decreases with span growth, showing an unlimited approaching phenomenon. Regarding aerostatic instability, the instability wind speed decreases with span to approximately 3000 m, and increases when the span is in the range of 3000 to 5000 m. Minimum aerostatic instability wind speed with SBS or LTS girder would be lower than observed maximal gust wind speed, indicating the probability of aerostatic instability. This study proposes that suspension bridge with span approximately 3000 m should be focused on both aerostatic instability and flutter, and more aerodynamic configuration optimistic optimizations for flutter are essential for super long-span suspension bridges with spans longer than 3000 m.

关键词： suspension bridge     super long-span     finite element model     aerodynamic instability     aerodynamic configuration    

HTML PDF 收藏

Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO,Yoko OKAZAKI

《结构与土木工程前沿（英文）》 2016年 第10卷 第1期   页码 93-102 doi: 10.1007/s11709-015-0311-0

摘要： Wind-tunnel study on the improvement of aerodynamic stability of simplified suspension-bridge girder structures was conducted with using a 1/40-scaled section model. Objective of the study is the development of an economically superior suspension bridge with 500–1,000 m center span length. The wind-tunnel test showed that an edge-girder type cross section exhibited large amplitude torsional vortex-induced vibration as well as torsional flutter at a low wind speed. Accordingly, aerodynamic countermeasures of open grating deck and triangular faring, and structural countermeasures of center stay, diagonal bracing and mass increase were tried to improve the aerodynamic stability. Finally, feasibility of the best combination to a full-scale bridge was examined by structural analysis.

关键词： suspension bridge     aerodynamics     simplified girder     wind-tunnel test    

HTML PDF 收藏

Comparisons of bridges flutter derivatives and generalized ones

Fuyou XU , Zhe ZHANG , Cailiang HUANG , Airong CHEN ,

《结构与土木工程前沿（英文）》 2009年 第3卷 第3期   页码 272-278 doi: 10.1007/s11709-009-0042-1

摘要： The causes of the nonlinearity of self-excited aerodynamic force of bridge are interpreted from such two aspects as amplitude and wind velocity. The concept of “generalized flutter derivative” is proposed, and its physical meaning is illustrated. The graphs of the generalized flutter derivatives of plate and Sutong Bridge section model are plotted. The characteristics of all generalized flutter derivatives are compared and analyzed, and their superiorities are verified. The results indicate that the physical meaning of generalized flutter derivatives are more explicit compared to the traditional ones. It is more convenient to understand the nonlinearity properties of self-excited aerodynamic force of bridge according to the generalized flutter derivatives graphs with the wind velocity as the horizontal coordinate.

关键词： bridge     flutter derivative     generalized flutter derivative     self-excited aerodynamic force     Sutong Bridge    

HTML PDF 收藏

跨海悬索桥结构危险性分析

张强,马敬海

《中国工程科学》 2010年 第12卷 第7期   页码 61-63

摘要：

阐述了桥梁结构危险性分析的方法论，根据危险性分析服务对象和目的，确定了跨海悬索桥结构危险性分析的内容和方法。在总体危险性分析层面确定需要控制的桥梁结构风险，在单元危险性分析层面确定如何对这些风险的控制，同时将特殊事件和维修等因素也纳入危险性分析，保证了桥梁生命周期内所有风险的无遗漏分析和控制。

关键词： 悬索桥     结构危险性分析     桥梁管理    

HTML PDF 收藏

Self-propelled automatic chassis of Lunokhod-1: History of creation in episodes

Mikhail MALENKOV

《机械工程前沿（英文）》 2016年 第11卷 第1期   页码 60-86 doi: 10.1007/s11465-016-0370-5

摘要：

This report reviews the most important episodes in the history of designing the self-propelled automatic chassis of the first mobile extraterrestrial vehicle in the world, Lunokhod-1. The review considers the issues in designing moon rovers, their essential features, and the particular construction properties of their systems, mechanisms, units, and assemblies. It presents the results of exploiting the chassis of Lunokhod-1 and Lunokhod-2. Analysis of the approaches utilized and engineering solutions reveals their value as well as the consequences of certain defects.

关键词： moon rover     self-propelled chassis     propulsion     wheel     suspension     soil properties     cross-country ability    

HTML PDF 收藏

海洋桥梁工程施工技术及装备发展研究

张瑞霞

《中国工程科学》 2019年 第21卷 第3期   页码 5-11 doi: 10.15302/J-SSCAE-2019.03.015

摘要：

随着全球经济一体化战略的实施，海洋桥梁已成为各国基础设施重要的组成部分，这条绚丽的蓝色纽带也将带动海洋经济的快速发展。目前，已建成的海洋桥梁结构形式及施工装备还远不能满足桥梁向纵深海域发展的需要，为储备高端关键技术，迫切需要深入海洋桥梁施工技术及装备发展战略研究。在深水基础方面，着重对沉井基础、设置基础及大直径钢桩基础的大型化、装配化及智能化提出研究方向；在海洋桥梁的斜拉桥及悬索桥上部结构方面，就主塔、主梁及索束的结构形式及施工方法重点研究大节段制造运输、自动调整对位安装、结构抗风措施等；在智慧建造方面，提出结合信息化平台及可视化装备进行综合应用性研究。

关键词： 海洋桥梁     设置基础     沉井     大直径钢桩     斜拉桥     悬索桥     智能化     建筑信息模型技术    

HTML PDF 收藏

大跨度桥梁抗风技术挑战与基础研究

项海帆,葛耀君

《中国工程科学》 2011年 第13卷 第9期   页码 8-21

摘要：

以我国30年大跨度桥梁的快速发展为研究背景，对3种大跨度桥梁的抗风技术挑战进行了基础性研究和应用性研究，着重探讨了悬索桥的颤振性能及其控制、斜拉桥风振性能与拉索风雨振控制、拱式桥涡激共振及其控制、特大桥梁风振精细化理论等一系列抗风关键问题。研究结果表明：悬索桥的颤振稳定性跨径上限约为1 500 m，超过甚至接近这一上限时，必须采取措施改善加劲梁的抗风稳定性；千米级大跨度斜拉桥仍具有足够高的颤振临界风速，其主要抗风问题是长拉索的风雨振动；大跨径拱桥除了个别有涡振问题之外，还没有受到结构抗风性能的影响。文章还提出了三维桥梁颤振精确分析的全模态方法、任意斜风作用下桥梁抖振频域分析方法、基于二阶矩理论和首次超越理论的桥梁颤振和抖振可靠性评价方法，揭示了桥梁颤振演化规律、驱动机理和控制原理。

关键词： 悬索桥     斜拉桥     拱桥     颤振     抖振     涡振    

HTML PDF 收藏

Sulfur-deficient CoNi2S4 nanoparticles-anchored porous carbon nanofibers as bifunctional

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1707-1717 doi: 10.1007/s11705-023-2308-x

摘要： Water electrolysis technology is considered to be one of the most promising means to produce hydrogen. Herein, aiming at the problems of high overpotential and slow kinetics in water splitting, N-doped porous carbon nanofibers-coupled CoNi2S4 nanoparticles are prepared as bifunctional electrocatalyst. In the strategy, NaCl is used as the template to prepare porous carbon nanofibers with a large surface area, and sulfur vacancies are created to modulate the electronic structure of CoNi2S4. Electron spin resonance confirms the formation of abundant sulfur vacancies, which largely reduce the bandgap of CoNi2S4 from 1.68 to 0.52 eV. The narrowed bandgap is conducive to the migration of valence electrons and decreases the charge transfer resistance for electrocatalytic reaction. Moreover, the uniform distribution of CoNi2S4 nanoparticles on carbon nanofibers can prevent the aggregation and facilitate the exposure of electrochemical active sites. Therefore, the composite catalyst exhibits low overpotentials of 340 mV@100 mA·cm–2 for oxygen evolution reaction and 380 mV@100 mA·cm–2 for hydrogen evolution reaction. The assembled electrolyzer requires 1.64 V to achieve 10 mA·cm–2 for overall water-splitting with good long-term stability. The excellent performance results from the synergistic effect of porous structures, sulfur deficiency, nitrogen doping, and the well-dispersed active component.

关键词： nanoparticle     sulfur vacancy     porous carbon nanofiber     transition metal sulfides     electrolysis    

HTML PDF 收藏

Nanosilver anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient

《化学科学与工程前沿（英文）》 2023年 第17卷 第7期   页码 893-905 doi: 10.1007/s11705-022-2290-8

摘要： A novel alginate/poly(acrylic acid/acrylamide) double-network hydrogel composite with silver nanoparticles was successfully fabricated using the sol–gel method. The presence of carboxyl and amide groups in the network structure provided abundant active sites for complexing silver ions, facilitating the in situ reduction and confinement of silver nanoparticles. In batch experiments, the optimal silver loading was 20%, and 5 mmol·L–1 of p-nitrophenol was completely degraded in 113 s with a rate constant value of 4.057 × 10−2 s–1. In the tap water system and simulated seawater system, the degradation time of p-nitrophenol at the same concentration was 261 and 276 s, respectively, with a conversion rate above 99%. In the fixed-bed experiment, the conversion rate remained above 74% after 3 h at a flowing rate of 7 mL·min–1. After 8 cycling tests, the conversion rate remained at 98.7%. Moreover, the catalyst exhibited outstanding performance in the degradation experiment of four typical organic dyes.

关键词： double-network hydrogel     dye degradation     silver nanoparticles     alginate    

HTML PDF 收藏

大跨径悬索桥地基基础安全监控模型的研究思路及技术路线

陈志坚,周世忠,卓家寿

《中国工程科学》 2002年 第4卷 第6期   页码 20-24

摘要：

分析了江阴大桥南塔墩之地基和南锚碇之抗力体的层状岩质边坡稳定问题的复杂性及其安全监控模型建立的重要性和技术难点。阐述了建立边坡稳定原因量之塔墩荷载分布和锚碇剩余推力监控警戒模型、基于外部变形观测成果的边坡安全性综合评判模型以及基于内部剪切位移观测成果的边坡稳定性预测预报模型的研究思路和技术路线。

关键词： 层状岩体     边坡     监测     监控模型     研究思路    

HTML PDF 收藏

标题 作者 时间 类型 操作

Calculation method on shape finding of self-anchored suspension bridge with spatial cables

Yan HAN, Zhengqing CHEN, Shidong LUO, Shankui YANG

期刊论文

Investigations concerning seismic response control of self-anchored suspension bridge with MR dampers

YANG Menggang, HU Jianhua

期刊论文

Computational fluid dynamic analysis of flutter characteristics for self-anchored suspension bridges

ZHU Zhiwen, WANG Zhaoxiang, CHEN Zhengqing

期刊论文

Limit span of self-anchored cable-stayed suspension cooperation system bridge based on strength

Zhe ZHANG , Huili WANG , Xiaomeng GE , Sifeng QIN ,

期刊论文

Experimental research on the multilayer compartmental particle damper and its application methods on long-period bridge structures

Zhenyuan LUO, Weiming YAN, Weibing XU, Qinfei ZHENG, Baoshun WANG

期刊论文

Aerodynamic stability evolution tendency of suspension bridges with spans from 1000 to 5000 m

期刊论文

Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO,Yoko OKAZAKI

期刊论文

Comparisons of bridges flutter derivatives and generalized ones

Fuyou XU , Zhe ZHANG , Cailiang HUANG , Airong CHEN ,

期刊论文

跨海悬索桥结构危险性分析

张强,马敬海

期刊论文

Self-propelled automatic chassis of Lunokhod-1: History of creation in episodes

Mikhail MALENKOV

期刊论文

海洋桥梁工程施工技术及装备发展研究

张瑞霞

期刊论文

大跨度桥梁抗风技术挑战与基础研究

项海帆,葛耀君

期刊论文

Sulfur-deficient CoNi2S4 nanoparticles-anchored porous carbon nanofibers as bifunctional

期刊论文

Nanosilver anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient

期刊论文

大跨径悬索桥地基基础安全监控模型的研究思路及技术路线

陈志坚,周世忠,卓家寿

期刊论文